/* Copyright 2008 Bas van den Berg
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef CACHE_H
#define CACHE_H

namespace Chronos {

template <typename T, size_t maxBlocks>
class Cache {
public:
    Cache() : count(0) {}
    ~Cache() {
        while (count != 0) {
            --count;
            ::operator delete(blocks[count]);
        }
    }
    void* get() {
        if (count == 0) {
            return ::operator new(sizeof(T));
        }
        --count;
        return blocks[count];
    }
    void put(void* block) {
        if (count < maxBlocks) {
            blocks[count] = block;
            ++count;
        } else {
            ::operator delete(block);
        }
    }
private:
    void* blocks[maxBlocks];
    size_t count;
};

}

#endif

